Robotic lawn mower including removable rechargeable battery module

Outdoor power equipment, comprising:

• a wheel motor;
• a chore motor;
• and
• a power system configured to supply electrical power to the wheel motor and the chore motor, the power system including:
• a plurality of receptacles, each being configured to receive a battery pack;
• and
• a battery management system configured to control discharging of each of the battery packs installed within the plurality of receptacles, wherein the battery management system is configured to control which of the battery packs supply current to a power bus so that the power system is operable when an additional battery pack is installed within an open receptacle of the plurality of receptacles that defines a different charge level than one of the battery packs installed within the plurality of receptacles.

Outdoor power equipment, comprising:

• a battery pack;
• a receptacle configured to receive the battery pack;
• a wheel motor configured to receive electrical power from the battery pack;
• a chore motor configured to receive electrical power from the battery pack;
• a gyroscopic sensor configured to detect an orientation of the outdoor power equipment;
• and
• a controller in communication with the wheel motor, the chore motor, and the gyroscopic sensor, the controller is configured to provide additional power from the battery pack to the wheel motor based on detection of the orientation exceeding a predetermined threshold value.